Concrete-mixer.



PATENTED AUG. 8, 1905.

W. B. MARTN. CONCRETE MIXER..

Brummen funn 00T. 13,1904.

2 SHEETS-SHEET 1.

Wtnesses: Y nventor;

/ if l v Rttomegs.

PATENTED AUG. 8, 1905.

W. B. MARTIN. CONCRETE MIXER.

nrLo'noN FILED 00T. 13. im.

2 SHEETS-SHEET 2.

f f Rttomegs.

W' z Y These iiights are combined with the sha each adjacent partition36, forming a measuring-cup, into which a predetermined quantity ofmaterial is fed and discharged on each rotation of the cup, the fiangesconstitutin also cut-offs. to or are inte ral with hubs 38, throu hwhich pass' sha ts 39, 40, and 41, said sha ts being suitably journaledin the sides of the casing and projecting at one end therefrom. Theshaft 40, which is clearly shown in Fig. 2, constitutes the driveshaftand carries three sprocket-wheels 42, 43, and 44, the shaft being drivenin any suitable manner, as by a pulley 45, around which passe-s a beltleading to a suitable source of power not necessary to be shown. Aroundthe sprocket- Wheel 42 asses a` sprocket-chain 45', the lower ben ofwhich engages a sprocketwlieel 46 on a shaft` 47, presently to bedescribed. The sprocket-.wheel 43 carries a sprocket-chain `48, whichpasses around `a sprocket-wheel 49 on the shaft 41, While thesprocket-wheel 44 carries a sprocket-chain V50, which passes around asprocket-wheel 51 on the shaft 39. By this arrangement the srocket-Wheels and sprocket-chains and all t e measui'in -cups arc drivenin the same direction and om the same source of power as lis also theshaft 47. Arranged longitudinally of the casing and extending from bothends thereof is a chute 52, which is connected with a discharge-spout53, that extends outward beyond the casing and is provided at its freeend with a lip 54, the spout being su ported from the casing by a pairof brace-ro s 55, onl one of which is shown, arranged on each side ofthe spout, and by a brace-rod 56,secured to the spout near its outer endand to the up er portion of the casing. This spout may ige circular incross-section, as shown, or semicircular, as may be desired, and as thelatter construction Will be obvious illustration thereof is deemedunnecessary. Arranged within the discharge-spout is a worm or conveyerwhich constitutes one of the essentialfeatures of the present invention,inasmuch as it not only o crates to remove the mixed material from t ecasing, butalso thoroughly to mix the in ,gredients before discharge.This conveyer consists of se ments or flights 57, each being a proximatey a half-circ e and being twisted on a compound curve, the flights beingdisposed in break-joint relation to each other, so that when assembledthey will, in effect, present a screw, but with spaces between theterminals of the Aadjacent lights which will permit the terminals topresent a means for cutting through thel mass and of thoroughly mixingand in a measure disintegratin through themedium of' arms 58, thel outerends of which are riveted to the i hts and the inner-'ends of which arerigidly olted to the shaft. The rear end of the shaft is jour- Thepartitions 36 are secure naled in suitable bearings in the side of thecasing and, as before stated, is driven through the medium of thesprocket-chain 45 and s rocket-wheel 46, and the outer end of the s aftis journaled in a box 59, carried by a three-legged spider 60, securedat or near the discharge end of the spout.

To supply the necessary water to the ingredients while being mixed,there is a i e 61, which is supported near its outer end) lgy a bracket62, secured to the spout, and passes through a bearing or collar 63,secured to the side o the casing, and thence into the casing andsubstantially across its entire width, as shown in Fig. 2, the portionof the ipe within the casing being provided witli suitable perforationsto permit escape of Water. The outer end of the pipe is provided with anipple 64 to allow attachment thereto of a hose or other suitableWater-feeding device.

The operation of the device is as follows: Sand, cement, gravel, orstone is supplied, respectively, to the compartments `5, 6, and 7 andrfalls upon the ledges 15, 16, and 17, it being understood that thematerial is fed into Ythe compartments in such manner as to cause `itrst to lodge u on the ledges.

The cups being rotated, eac compartment thereof Will removf` from themass a predetermined charge and dischagge it down the chute into theinner portion of the discharge-spout, the cutoffs 37 preventing anyaccidental escape of materia from the compartments to the chute until'anadditional cup is presented` for another charge. As the materials fromthe three compartments pass to `the dischar espout they are sprayed withWater from t e pipe 61, and as they are moved forward by the conveyorthey are thoroughly commingled, so that when discharged from the spouttheir treatment wilLbe thorough. The rapidit of the operation of thetotal output of the evice will of course be controlled by the rate ofspeed at which the cups and other rotative parts of the mechanism aredriven.

As shown in Fig. 1 one of the compartments 7 is provided with acheck-plate 20; but, if

preferred, this may be combined with each of the compartments, as shownin Fig. 5, and still be within the scope of the invention.

It will be seen from the foregoing' descrip- `tion that although theapparatus of this 1nvention is exceedingly simple of construction itcombines in a feasib e 'and practical manner all the elements necessaryfor the production of a thoroughly-effective machine, and, further,owing to the sim licity of the4 construction of the parts and the mannerin which they are assembled liability of breakage in use is reduced to aminimum and great'facility of repairs is secured.

Itwill be noted that the cups are of different sizes, that for supplyinggravel or stone to the chute being the largest, that for supplyi'ng sandthe next largest, and that for supplyin portions generally be thatadopte paratusybut it is to be understood that the di'erent cups may bechan ed in their relative roportions tov each ot er, if the saine etweenthe cu s herein shown will sho d he found necessary or desirable,without ldeparting from the spirit of the inves tion.

Havin thus described the invention,| what is elaime is An apparatus ofthe class described comprising a casing divided into a pinraity ofcompartments each provided with s shield constituting a throat-picco,rotative measuring devices arrangd in the compartments adiaeent to the s'olds and havin their siafts arranged in the saine plane, an ledgesdisposed above the measuring devices to cause a' side feed of thematerial thereto.

2. In an a paratus of the class described, a casing divi ed into aplurality .of eoinpartments of diferent size-s, rotative measuringdevices arranged in the com artments the shafts of which are arrange onthe saine plane, means for independently operatin the devices, curvedextensions arrsn e above the devices and cari' ing each a lei? e, achute arranged below t e measuring vices, and a eonveyer driven from thesaid devices and operating to mix and remove the material from theapparatus.

cement the smallest, and the proE I in an organized .ap-V

An apparatus comprising e. casing divided into a piurality ofcompartments each provided with a shield constituting a throat-piece,rotative nieasnrn devices arranged into compartments a 'scent to theshield and having their sliaits arranged in the saine plane, ledgesdisposed above the measuring devices to canse a side feed of theinateriai thereto, and spring s pressed cheek plates coaeting with thesaid devices.

a 4. in an apparatus of the class described, a casing supporting apinrality of differentsized rotative measuring devices, formed into cupseach inciuding a. cut-ofi, a s ring ressed check plate cogerating Witthe argest Iof the devices, a e ute arranged below the measnrin devices,a spout constituting a portion of t e chute and projecting laterallyfrom the casing,` and a eonveyer arranged within the spout andcomprising a plurality of inversely-twisted segments, the

terminals of which are arranged in break= joint order with relation toeach other.

In testimony that l claim the foregoing as my own I have hereto aiiixedmy signature in the presence of two Witnesses.

WLLIAM B. MARTN.

Witnesses:

WM. FLEMING, ED. PEIRoE.

ofthe ciass described'

